<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="/demo3" method="POST">
        <input name="username">
        <input type="submit" value="提交">

    </form>
<hr>

<a href="/day14/requestDemo4">demo4...</a>



</body>
</html>